PA4220 95027 ANALOG PRODUCTS DIVISION Pop-Up and Shutdown Noise Suppressor FEATURES GENERAL DESCRIPTION PA4220 is a low power (ICC< 1μA) monolithic mixed signal device. PA4220’s function is to control the power supply transition noise in audio systems. PA4220 boasts several features that make it a “one of a kind” product on the market. Most prominent is the feature is that it does not require any external signal to suppress POPUP and SHUTDOWN Noise. Extremely Low supply current (<1μA). Shunt operation hence distortion free. Instantaneous. Power-up and Power-down muting. No external microcontroller signal needed. ESD protected outputs. 1.5V to 5V supply operation. Handle up to 3.5V RMS signal. Compact 2 x 2 x 0.8mm 6L DFN. Standard 8L SO-8 package. PA4220 requires few external components for its operation, working from low to medium supply voltages of up to 5V. The ramp time of the supply should be greater than 50ms. APPLICATIONS On power-up and power-down the output of the amplifier stage is switched to a convenient low impedance voltage rail hence muting the amplifiers, preventing the audible pop, which is normally heard in the headset or speakers. Cell phones PDA’s Portable DVD players Portable MP3 players Notebook Audio Set-top boxes Digital Video Recorders LCD TVs Home Theater systems P A 4 2 2 0 operates as a passive shunt device hence the designer does not have to worry about the device introducing any kind of noise or distortion into the system. It has extremely low current consumption (<1uA). PA4220 is equipped with ESD (Human Body Model) protection circuitry on the outputs. Pin Layout and Description PA4220 is available as an 6L low profile 0.8mm DFN package and 8L SO-8 package. It is specified for operation over the -40° C to +85°C temperature range. Pin# DFN-6 Pin # SOIC-8 Description Notes 1 1 RCS Power ON delay capacitor 2 2 GND Ground 3 NC No Connect 3 4 Ch2 Channel 2 control signal 4 5 Ch1 Channel 1 control signal 6 NC No Connect 5 7 Vcc Vcc 6 8 Cap Holding capacitor CH1 CH2 Functional Diagram VCC PA4220 Startup & Shutdown Control C2 VCAP 6 VCC 5 CH1 RCS 1 4 7 NC 3 RCS C2 = 100μF (Typ.) C3 = 1μF (Max.) 8 VCAP GND 2 1 C3 2 3 GND CH2 CH2 6 NC 4 DFN-6 Top View VCC 5 CH1 Ordering Information Temp Range Package SOIC-8 PA4220DQ-T7 DFN-6 PA4220DN-T7 -40 to +85°C SOIC-8 Top View 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715 www.protekanalog.com 95027.Rev 0.0 12/10 PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT. NOT FOR USE IN LIFE SUPPORT SYSTEMS Part Number PA4220 ANALOG PRODUCTS DIVISION Pop-Up and Shutdown Noise Suppressor ABSOLUTE MAXIMUM RATINGS (All Voltages are referenced to GND) VCC ........................................................................................+6V Continuous Current (IN_, OUT_).....................................±150mA Continuous Current (All Other Pins) .................................±20mA Continuous Power Dissipation (TA = +70°C) Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................+150°C Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING CONDITIONS: DC OPERATING CONDITIONS Unless otherwise specified, VDD=5 ± 10%, TA = Ambient Temperature = 25 °C. Limit Symbol Parameter Condition Unit Min VDD Power Supply Normal Operation IDD Supply Current Normal Operation TA Ambient Temperature Normal Operation VOH Logic High O/P Voltage IOH=100μA VOL Logic Low O/P Voltage IOL=-100μA VIH Logic High I/P Voltage IIH=1μA VIL Logic Low I/P Voltage IIL=1μA RON Switch ON Resistance VDD=5V THD Total Harmonic Distortion VSIG Analog Signal Range RL = 32 Ω, 30mW, f = 1kHz Normal Operation Typical 2.3 -40 Max 5.0 V 1 µA 85 ºC VDD-0.1 V 0.2 V VDD-0.3 V 3 0.3 V 4 Ω .020 % 3.5 VRMS 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715 www.protekanalog.com 95027.Rev 0.0 12/10 PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT. NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4220 ANALOG PRODUCTS DIVISION Pop-Up and Shutdown Noise Suppressor Typical Applications C1 R1 R2 R1 R2 Output Amp R3 C1 Output Amp R3 Set-Top Box C1 = 10 – 47μF R1 = 100 – 220Ω R2 = 0 – 220Ω R3 = 10kΩ PA4220 Vcc Startup & Shutdown Control C2 = 100μF (Typ.) C3 = 1μF (Max.) C2 C3 Typical Connection Configuration for PA4220 in Set Top Box Application 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715 www.protekanalog.com 95027.Rev 0.0 12/10 PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT. NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4220 ANALOG PRODUCTS DIVISION Pop-Up and Shutdown Noise Suppressor Applications continued C1 Amp R1 Left Output R3 RL R2 Right Output C1 R3 Amp R1 C1 = 220μF R1 = 5K – 20KΩ R2 = 100Ω R3 = 0-30Ω RL R2 MP3 Player RL= 32Ω PA4220 Vcc Startup & Shutdown Control C2 = 100μF (Typ.) C3 = 1μF (Max.) C2 C3 Typical Connection Configuration for PA4220 in MP3 Player Application 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715 www.protekanalog.com 95027.Rev 0.0 12/10 PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT. NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4220 ANALOG PRODUCTS DIVISION Pop-Up and Shutdown Noise Suppressor THEORY OF OPERATION STARTUP SHUTDOWN During Startup, the Power supply ramps from 0V to VCC. It is critical that this rise time be around 50ms for the PA4220 to perform well. This sudden rise in VCC causes the DC Blocking Capacitor to charge and thereby the pop up noise. The PA4220 senses this sudden change in voltage and clamps the output line to a low impedance state and suppresses the Pop noise. The capacitor at the RCS pin determines the time for which the line can be kept in low impedance state during startup after which the switch is released and normal operation is started. During Shutdown, the reverse process happens. As the power supply reaches the threshold on its way down, the PA4220 turns the internal switches ON and hence clamping the output stage to low impedance state suppressing the shutdown noise. This operation is governed by the charge stored in the capacitor connected to VCAP pin. Figure 1: Startup Pop-Noise without PA4220 (32 Ω load) Figure 3: Shutdown Noise without PA4220 (32 Ω load) Figure 2: Startup Pop-Noise Reduction with PA4220 (32 Ω load) Figure 4: Shutdown Noise with PA4220 (32 Ω load) 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715 www.protekanalog.com 95027.Rev 0.0 12/10 PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT. NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4220 ANALOG PRODUCTS DIVISION Pop-Up and Shutdown Noise Suppressor SO-8 PACKAGE OUTLINE & DIMENSIONS PACKAGE OUTLINE SO-8 -A- 8 5 PA4220 XXXX I + -B - P 0.0I0” (0.25 MM) M B M PACKAGE DIMENSIONS 4 PL 4 DIM G A B C D F G J K P R D C 45 0 - I0 -T- + J F MILLIMETERS MIN MAX 4.80 3.80 1.35 0.35 0.40 1.27 BSC 0.18 0.10 5.80 0.25 INCHES MIN MAX 5.00 0.189 0.196 4.00 0.150 0.157 1.75 0.054 0.068 0.49 0.014 0.019 1.250 0.016 0.049 1.27 BSC 0.05 BSC 0.05 BSC 0.25 0.007 0.009 0.25 0.004 0.008 6.20 0.229 0.244 0.50 0.010 0.019 NOTES 0.0I0” (0.25 MM) M T B S A S 8 PL MOUNTING PAD 0.050 + 0.005” 0.030 + 0.005” 1. 2. 3. 4. 5. 6. - T - = Seating Plane and Datum Surface. Dimensions “A” and “B” are Datum. Dimensions “A” and “B” do not include mold protrusion. Maximum mold protrusion is 0.015” (0.380 mm) per side. Dimensioning and tolerances per ANSI Y14.5M, 1982. Dimensions are exclusive of mold flash and metal burrs. TAPE & REEL/BULK ORDERING NOMENCLATURE 0.I60 + 0.005” 0.045 + 0.005” 0.245” M!" 1. 2. 3. 4. Surface mount product is taped and reeled in accordance with EIA-481. Suffix-T7 = 7 Inch Reel - 1,000 pieces per 12mm tape. Suffix-T13 = 13 Inch Reel - 2,500 pieces per 12mm tape. No Suffix = Product Shipped in Tubes of 98 pcs per Tube. Outline & Dimensions: Rev 1 - 11/01, 06009 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715 www.protekanalog.com 95027.Rev 0.0 12/10 PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT. NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4220 ANALOG PRODUCTS DIVISION Pop-Up and Shutdown Noise Suppressor DFN-6 PACKAGE OUTLINE & DIMENSIONS PACKAGE OUTLINE DFN6 PA4220 XXXX PACKAGE DIMENSIONS MILLIMETERS MIN MAX 0.700 0.900 0.00 0.050 0.203 0.203 1.924 2.076 1.924 2.076 0.625 0.825 0.600 0.800 0.200 0.200 0.250 0.350 0.650 0.650 0.274 0.426 0.524 0.676 DIM A A1 A3 D E D1 E1 k b e L L1 INCHES MIN MAX 0.028 0.035 0.00 0.002 0.008 0.008 0.076 0.082 0.075 0.083 0.025 0.032 0.024 0.031 0.008 0.008 0.007 0.012 0.026 0.026 0.011 0.017 0.021 0.027 NOTES MOUNTING PAD 1. Dimensioning and tolerances per ANSI Y14.5M, 1982. 2. Dimensions are exclusive of mold flash and metal burrs. 0.65mm TAPE & REEL/BULK ORDERING NOMENCLATURE 1. Surface mount product is taped and reeled in accordance with EIA-481. 2. Suffix-T7 = 7 Inch Reel - 3,000 pieces per 12mm tape. 3. Suffix-T13 = 13 Inch Reel - 5000 pieces per 12mm tape. 0.90mm 0.90mm 2.2mm 0.8mm 0.5mm Outline & Dimensions: Rev 1 - 11/01, 06009 0.37mm X6 Tape and Reel Specifications (Dimensions in mm) Reel Dia A0 B0 K0 D E F W P0 P2 P t-max 178 (7”) 2.0±0.10 2.0±0.10 0.90±0.10 1.50±0.10 1.75±0.10 3.50±0.05 8.00±0.30 4.00±0.10 2.00±0.05 4.00±0.10 0.25 P0 D t P2 10 Pitches Cumulative Tolerance on Tape± 0.2 E Pin 1 indicated by Dot Top cover tape A0 F W K0 B0 P 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715 www.protekanalog.com 95027.Rev 0.0 12/10 PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT. NOT FOR USE IN LIFE SUPPORT SYSTEMS